This map, published by Covens and Mortier, was a re-engraved version of a 1703 map credited to Guillaume de l’Isle but actually engraved by his father, Claude, also a cartographer. Based on sources including d’Iberville, the explorer Le Sueur, and John Lederer’s names for Indian villages, it was the first printed map to accurately show the mouth of the Mississippi River and the delta. The Missouri River is also shown.
Guillaume de L’ Isle, appointed Royal Geographer in 1718, was the leading French cartographer of the early 18th century, and certainly among the most influential. He was known for his prolific output — over 100 maps — and his exceptional accuracy. From his first atlas, published at age 25, De L’Isle made an effort, unprecedented in his era, to base his work on verifiable, current data and to correct prevalent fallacies, such as the depiction of California as an island. His maps and atlases were frequently reissued after his death by Philippe Buache, Phillippe’s nephew Jean Nicolas Buache, and J.A. Dezauche. The Amsterdam publishers Covens and Mortier also reissued de L’Isle maps. De L’Isle maps served as inspiration for derivatives by various other cartographers including Jeremias Wolff and Matthäus Seutter.
Covens and Mortier was an Amsterdam firm formed in 1721 by Johannes Covens in partnership with the heirs of Pierre Mortier. Mortier, a Frenchman, had established a publishing house in Amsterdam by around 1685 and published or reissued maps by some of the great French and Dutch mapmakers of the late 17th and early 18th centuries, including Guillaume de L’Isle, Carel Allard and Jan Jansson. After Mortier’s death in 1711, the family continued the business and then joined with Covens. Covens and Mortier issued several atlases, including its major work Atlas Nouveau, published in nine folio volumes between 1711 and 1760. The firm also issued world and continent maps.
Subtitle: Dressée Sur un grand nombre de memoires principalement sur ceux de M[essieu]rs d’Iberville et le Sueur/ Par Guillaume de l’Isle Geographe de l’Academie Royale des Sciences. [Based on a large number of records, principally those of Mr. d’Iberville and Mr. le Sueur/ By Guillaume de l’Isle, Geographer of the Royal Academy of Sciences.]
“Guillaume de L’Isle: Carte de la Louisiane et Cours de la Mississipi. 1718.” University of Virginia Library: Exploring the West from Monticello. 9 November 2004. http://www.lib.virginia.edu/small/exhibits/lewis_clark/exploring/ch2-10.html (9 March 2006).
Potter, Jonathan. Collecting Antique Maps: An Introduction to the History of Cartography. London: Jonathan Potter Ltd., 1988, rev. 1999. pp. 56, 102.
Schwartz, Seymour and Ehrenberg, Ralph E. The Mapping of America. New York: Harry N. Abrams, 1980. pp. 142-43, pl. 82.
Tooley, R.V. Maps and Map-Makers. 4th Ed. New York: Bonanza Books, 1970. p. 35.